Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1979-04-10
1981-07-14
Rolla, Joseph J.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
209581, 209655, 250226, 356405, B07C 5342
Patent
active
042785383
ABSTRACT:
Workpieces (10; FIG. 7), differing from each other only in their color, are optically sorted by illuminating the workpieces with a light beam (13) of stable color temperature. The diffuse reflection from the workpieces is analyzed by three photo-detectors, each of which is filtered to respond to a different color. Two of the colors are primary colors, as defined by the Tristimulus Theory. The third color is not a true primary color but, when added to a percentage of one of the other two colors, effectively synthesizes the third primary color. A workpiece is identified by comparing the set of Tristimulus signals it generates with a look-up table stored in the memory (25) of a microprocessor (17).
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Lawrence Hopeton S.
Michalski John D.
Kirk D. J.
Rolla Joseph J.
Sheffield B. W.
Western Electric Company Inc.
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